非晶(Fe_(0.99)Cu_(0.01))_(78)Si_9B_(13)合金等温晶化动力学  

ISOTHERMAL CRYSTALLIZATION KINETICS OF AMORPHOUS (Fe (0.99)Cu_(0.01))_(78)Si_9B_(13) ALLOY

作　　者：刘学东[1] 王景唐[1] 

机构地区：[1]中国科学院金属研究所快速凝固非平衡合金国家重点实验室,博士研究生沈阳110015

出　　处：《金属学报》1992年第11期B493-B497,共5页Acta Metallurgica Sinica

摘　　要：利用DSC,结合XRD,TEM实验,研究了(Fe_(0.99)Cu_(0.01))_(78)Si_9B_(13)非晶合金等温晶化动力学,结果表明:该合金等温晶化按两个阶段进行,分別析出α-Fe(Si)固溶体和Fe_2B化合物利用局域Avrami指数的概念分析了两相的形核长大方式。并作出了出合金晶化的“C”曲线,通过对两相晶化激活能的分析得出:α-Fe(Si)相较Fe_2B相容易晶化析出,同时,Cu元素的添加有助于改善α-Fe(Si)相的形貌。Two stages of isothermal crystallization of the amorphous(Fe_(0.99)Cu_(0.01))_(78)Si_9B_(13) alloy were observed under examination by DSC together with XRD and TEM, i.e., precipitation of α-Fe(Si) solution and Fe_2B intermetallic compound. The nucleation and growth of both phases were analyzed based on the concept of local Avrami index and the crystallization 'C' curve of the alloy was obtained. Comparison of activation energies of crystallization of both phases indicates that the precipitation of α-Fe(Si) is easier than that of Fe_2B. Meanwhile, an addition of Cu to the FeSiB glass may improve the morphology of α-Fe(Si) particles.

关 键 词：金属玻璃 等温晶化 动力学 

分 类 号：TG139.8[一般工业技术—材料科学与工程]